Online Education For Gem Enthusiasts

  • 8,846 Members
  • 2,290 Articles
  • 138 Gemology Businesses
  • 154,138 Facebook fans

Become a Member

"IGS is a Godsend for me!"

- Charlie Bernheiser, IGS Member

"Thank you for the fantastic adventure!"

- John Parrot, IGS Member

Join Our Thriving Community

2,290 Articles
8,846 Members
138 Directory Listings

The world's best gem articles, published weekly.

Most Recent Articles

Scheelite Value, Price, and Jewelry Information

Large, faceted scheelites are among the most beautiful of all collector’s gemstones. They occur in many colors and fluoresce very brightly. If cut properly, scheelites can have tremendous fire.

Ten Big, Beautiful, and Affordable Engagement Ring Stones

Looking for a gem that will make a big impression on your finger, not your wallet? These ten gems make great options for affordable engagement ring stones.

Willemite Value, Price, and Jewelry Information

Willemite is prized for its intense green fluorescence. Too fragile for jewelry use, faceted specimens are extremely rare.

Utopia: Online Faceting Designs and Diagrams

Jeff Graham’s Utopia gem design is a large Barion pear cut for light to medium-colored stones. Learn about this advanced design for experienced cutters.

Leucite Value, Price, and Jewelry Information

Although abundant in various lava rocks, leucite is extremely rare in gem-quality form and often has a milky or cloudy look. Faceted stones as well as well-shaped crystals are prized by collectors.

Conflict-Free Diamonds: What Does it Mean?

Searching for an ethical engagement ring? Learn about conflict-free diamonds, issues with artisanal mining, and how to find a ring that’s right for you.

Become a Gemology Pro

  • Certification Courses
  • A listing in our business directory
  • Access to our up-to-date gemstone value guide
  • Access to premium articles on tools and techniques
Sign up for a Pro Membership
"Becoming a Pro Member of IGS just made good sense for my business. The gemology resources are fantastic, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer."
Paul Bierker, Paul Michael Designs
Jeweler, IGS Pro Member

The world's best online resource for gemstone appraisal

Over 15 years, we have assembled detailed pricing and value information for appraising over 70 different gemstones. The values in our guide come from a variety of sources including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers of commonly traded gemstones.

View the Price Guide

Take Your Passion for Gemstones to a Whole New Level

For as low as $6.25/month

See Plans & Pricing